He is now married to Lorraine Coyle Koppell, an attorney who narrowly lost a race for the New York State Senate in 2000 to Guy Velella.

[4] As attorney general, Koppell successfully brought a lawsuit to allow drivers under the age of 25 to obtain rental cars in the State of New York.

Mr. Koppell initiated dozens of public interest lawsuits, collected over $100,000,000 for the state treasury, and negotiated the largest environmental settlement in the history of New York.

[5] In 1994, Koppell sought a full term as attorney general, but lost to Judge Karen Burstein in the Democratic Primary.

He served as a member of the New York City Council from District 11 in the Bronx, covering the neighborhoods of Riverdale, Kingsbridge, Woodlawn Heights, Van Cortlandt Village, Norwood, and Bedford Park.

In 2014, Koppell ran against incumbent State Senator Jeffrey D. Klein in the Democratic Party primary, and was defeated on a 60 to 40 margin.